Supply of auxiliary air to internal-combustion engines



March 9 1926.

- A. H. Moss SUPPLY OF AUXILIARY AIR T0 INTERNAL COMBUSTION ENGINES Filed June 22 IWV E'LYTOW Patented Mar. 9, 1926.

UNITED STATES ARTHUR HARRIMAN MOSS, F MISTER/ION, ENGLAND. v

SUPPLY OEAUXILIARY AIR To INTERNAL-COMBUSTION ENGINES,

Application filed June 22, 1925. Serial No. 38,895.

To all whom it may concern: I

Be it known that I, ARTHUR HARRIMAN Moss a subjectof the King of Great Britain,

' residing at Misterton, in Nottinglramshire,

England, have invented certain new and useful Improvements in or Relating to the Supply of Auxiliary Air to Internal-CombustionEngines; and I do hereby declare that the following is a full, clear, and exact description of the same. I a

This invention relates to devices, for admitting an auxiliary supply of air to the fuel mixture in the induction pipe of an internal combustion engine, of the type providing an annular recess surrounding the induction pipe and separated from the passage therein by a partition having jet-proj ducing apertures through which the air is delivered, the object of the present invention being to furnish improved means for providing the partition with the jet-producing apertures. g

It has been proposed to use extra 7 air valves for internal combustion engines in which the air is admitted to the induction pipe between the coils of a spring which is extensible for adjustment purposes, but according to the present invention a coiled wire in annular form is disposed toprovide a partition having jet-producing apertures between the annular recess and the passage in the induction pipe. The size and number of the interstices between the coils which provide the jet-producing apertures may be adjusted by replacing the coil with one having a different pitch of the helix in which the wire is coiled, whilst the number of interstices of given width may be varied by the selection of a wire of suitable di ameter,

The ends of the annular coil are preferably separated for the admission of air Figure 2 is a sectional side view of. Figure 1, the section being taken on the line AA.

Figure 3is a perspective sectional View 0 the line B-B of F igure'l.

Figure 4 is a detached elevation of the annular coil and I Figure 5 is a sectional View illustrating a valve for automatically admitting air to the device. 1

Like reference numerals indicate like partsthroughout the'drawings,

The device illustrated comprises 'a' body 1 having a boring 2 adapted to form part of the induction passage leading from the carburetor to the cylinder or cylinders of an internal combustion engine. The body 1 conforms in'outline to the flanges by which the induction pipe is bolted to the carburetor and is intended to be fitted in place between these parts by means of bolt holes 3. l

The body 1 is formed with anann'ular recess 4 entirely surrounding the part of the induction passage constituted-by the boring 2, the recess 4 thus forming an enlargement of the induction passage. The recess '4 is continued by a cavity in the body 1 at 5 to an opening 6 to the atmosphere, and this opening is controlled by a suitable valve 7 which is spring-controlled as indicated at 8 and is capable of being operated by hand from the drivers seat orother suitable position by means of Bowden Wire 9.

A length of coiled wire 10 is curved into an annular form as indicated in Figure 4 and is disposed invtl e recess 4, for which purpose one side of the recess is constituted by a removable washer 11 which is let into one side of the body 1 so as to be flush with the outer surface of the body. The annular coil 10 and the washer 11 may be retained in place by set screws 12 having countersunk heads engaging the edges of the washer 11. If desired, however, both side Walls of the recess 4 may be integral with the body 1, the annular coil 10 being inserted into the recess from the boring 2. In either case ,the'recess 4 maybe undercut to any desired shape as for example by the provision of a flange or flanges or series of projections, the annular coil 10 being threadedthrough at the junction of the recess 4 with the cavity 5 if the washer 11 is not provided.

The diameter of the turns of wire comprising the annular coil 10 preferably abrresponds to the width and depth of the recess 4 so that the coil substantially fills the recess as indicated in the drawings. The ends of thee-oil 10 are separated andthe gap between them is disposed at the junction of the recess .L with the extension cavity 5. The ends of the coila-re connected by a plate or impervious ring section 13 which is curved transversely-to-fit' approximately one half of the interior of the coil 10 and is also curved longitudinally to correspond with the I curvature of the annular coil which is coaxial with the boring 2. The ,plate13 .is disposed with itsends engaged inside the ends of the annular coil 10 and with'its concave surface facing the extension cavity .5 and v air inlet '6." In this manner when the valve 7 is open air will be drawn by thesuc-tion of the enginethrough the inlet 6 along the cavity 5 and will be'defieoted by the plate 13 into the interior of the annular coil 10, whence it issues into the induction passage through the interstices of those portions of the turns comprising the coil which separate the recess 4 from the induction passage. c

If it be desired wholly to prevent the direct'passage of airfrom the cavity 5 into the induction passage the spaces at the sides of the plate 13 may be closed by suitably shaping either the plate '13 or the adjacent parts of the body 1. As an alternativeto such special shapingthe plate 13 may be formed to fit outside insteadof inside the ends of the annular coil 10.

"As a modification the parts may be so shaped and disposed that the annular coil 10, instead of substantially"filling the recess et leaves a space for the passage of air in the recess, the' 'air then passing through both the outer and the inner interstices of the annular coil 10. In thisease the annular COll 10, instead of being circular in transverse section mayfbe of a flattened rectangular or elliptical shape disposed at the edges of the'recess lfl I lfqdesired the annular'coil 10 may easily be replaced by another in which the numher :orsize of the interstices between the coil-turns thereof are varied in order to adjust. the volume of 'air admitted through them to suit different circumstances, the

, number of interstices being variedaccording illustrated in Figure 5. This valve may be be provided eitherinaddition to or instead of the hand controlled valve 7.

What I claim is 1. In a devicefor admitting an auxiliary supply of air to the fuel mixture in the induction pipe of, an internal. combustion engine, the combination of a body having a boring. adapted to form' part of the ,in duction pipe and provided with an annular recess forming an enlargement ofthat bor ing, a valve communicatinghby a passage in the body With the recess :a coiled, wire in annular form disposed :to provide a partition having jeteproducing aperturesbetween the recess and boring-substantially as specified. f. I

2. In a device for admitting an auxiliary supply of air to the fuel mixture in @the induction pipe of an internal combustion engine, the combination of a body having a boring adapted to form part of the induction pipe and provided with an annular recess forming an enlargement of that. bOl'.

ing, a valve communicating by a passage in the body with the recess, a-coiled ,wire -in annular form disposed to provide a parti: tion having jet-producing apertures between the recess and boring, the ends of the annular coil beingseparated at the said passage .and an impervious ring section connesting the coilends across said passage to deflect air into the coil, substantially as a In a device for admittinganlauxilia y supplyfof air to the fuelrmixture in the ing, a movable washer forming c on'eiside of:

the recess, a valve communicat ng: by a passage in the body with the. recess, and a: coiled wire in annular form disposed to provide a partition having jet-producingapertures, between the recess and boring, substantially as specified. f v i 4. In a device for admitting anauxiliary supply of air to the fuel mixture in the induction pipe of an internalcombustionengine, the combination of a body, having a. boring adapted to form partjoflthepinduo tion. pipe and provided. with an annular recess forming an enlargementofthat boring, a movable washer forming one side of the recess; a .valve communicating. by a passage indthebody with the'recess, a coiled-wire in annular form disposed to provide a'partition having jet-producing aper tures between the recess and boring, the

ends of the annular coil being separated at the said passage, an impervious ring section connecting the coil ends across said passageto deflect air into the coil, a priming tap communicating with the said passage, a second passage to the recess from the atmosphere and a spring-controlled nonreturn inlet valve to the second passage, substantially as specified. c

In testimony whereof I hereunto affix my signature.

ARTHUR HARRIMAN Moss. 

